1. **State the problem:** Simplify the expression $5(11 \times 10^3)$ using standard notation. 2. **Recall the multiplication rule:** When multiplying numbers, multiply the coefficients and keep the power of ten as is. 3. **Calculate the product inside the parentheses:** $$11 \times 10^3 = 11 \times 1000 = 11000$$ 4. **Multiply by 5:** $$5 \times 11000 = 55000$$ 5. **Final answer:** The simplified expression is $55000$ in standard notation.